Nah, the old EJBs had a terrible programming interface. JavaEE 6 introduced a lot of good changes, but it was too late to convince people to switch back from Spring. To me it's like people abandoned JavaEE because it was hard to write fairly simple applications using EJBs (because it was) and switched to Spring, and then started writing large monoliths in Spring and realized they need to break them up into modules, so they invented microservices, but implemented them as standalone Spring Boot instances... when now it would be easier to go back to EJB + JMS. Microsoft has quite a similar "technology" called Microsoft Orleans, but it doesn't get much attention.